Preparation and Characterization of Hybrid Aqueous Dispersions Composed of Silica Sol and Poly(styrene-co-acrylate)  

作　　者：黄福明 张国伟 胡春圃 应圣康 

机构地区：[1]Key Laboratory for Ultrafine Materials of Ministry of Education,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Chinese Journal of Chemical Engineering》2005年第6期816-823,共8页中国化学工程学报（英文版）

基　　金：Supported by Science and Technology Commission of Shanghai Municipality (No. 0212nm008).

摘　　要：A stable silica sol with 3-5 nm in diameter, which can form homogeneous film without crack, was prepared and characterized. Then, the inorganic-organic hybrid aqueous dispersion composed of such a silica sol and an emulsion of styrene （St） and acrylate （Ac） copolymer was prepared and the hybrid effect between the silica sol and poly（St-co-Ac） was observed by Fourier transform infra-red （FT-IR） spectroscope. The toughness of the film prepared by this kind of hybrid aqueous dispersion was excellent, as it was enhanced appreciably by commixing with a small amount of poly（St-co-Ac） emulsion. Some amino-polysiloxane modified hybrid aqueous dispersions were also prepared and the properties of the modified dispersions and their films were investigated. The experimental results showed that the film prepared with such an amino-polysiloxane modified hybrid dispersion exhibited excellent hydrophobicity and low surface energy after heat treatment for 1.5 h, during which the formation of the graft copolymer was observed. The surface energy of this film decreases as a result of the enrichment of siloxane segments on the film surface.有在直径的 3-5 nm 的稳定的硅溶胶，没有快克，能形成同类的电影，被准备并且描绘。然后，由如此的硅溶胶组成的无机器官的混合水分散体和苯乙烯(圣) 和压克力的乳剂吃了(交流) 共聚物被准备，在硅溶胶之间并且 poly 的混合效果(St-co-Ac ) 被 Fouriertransform 观察红外线(英尺红外) 分光镜。这种混合水分散体准备的电影的坚韧是优秀的，当它被 commixing ofpoly 与小数量有点提高(St-co-Ac ) 乳剂。修改混合水分散体也是的某 amino-polysiloxane 准备了，修改分散和他们的电影的性质是结果显示出的 investigated.Theexperimental 与如此的 amino-polysiloxane 准备的电影修改了混合分散，这为 1.5h 在热处理以后展出了优秀 hydrophobicity 和低表面能，在哪个期间接枝共聚物的形成被观察。这部电影的表面能在电影表面上由于 siloxane 片断的丰富减少。

关 键 词：silica sol COPOLYMER aqueous dispersion inorganic-organic hybrid amino-polysiloxane 

分 类 号：O631.3[理学—高分子化学] O613.72[理学—化学]